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Color issue when disable SGX on AM335x GP EVM

Max Lin
Intellectual 1565 points


Hi Champs,

I am the 2012FAA in Taiwan and study the Sitara with HLOS, like Android.

I used the Rowboat Gitorious to build an TI Android JB 4.1.2 DevKit 4.0.1 image without SGX.

(Reference: http://processors.wiki.ti.com/index.php/TI-Android-JB-4.1.2-DevKit-4.0.1_DeveloperGuide)

And It works but I found that the color on the AM335x GP EVM board is incorrect (It seem that Red and Blue swapped).

I also survey this issue on E2E and see the blow link:

http://e2e.ti.com/support/embedded/android/f/509/t/192825.aspx

And here is the information about AM335x Silicon Errata:

My question is why the color incorrect by using the filesystem without SGX, which is not happen with SGX?

Is there any method to calibration the color when I re-build the image?

Does we fix the color reversed of AM335x by using the SGX calibration?

Thank you for your reply :)

Best Regards,

Max Lin

  • 0
    TI__Expert 7220 points

    Hi Max Lin,

    The SGX only operate in BGR format and the LCD controller is expecting the data in RGB format for display. So the CPLD routing of SOC LCD lines to the LCD display is swapped to convert the BGR data from SGX to the Display lines.

    Regards,

    Arun